Sometimes strategy is important. Sometimes being a decent human being trumps "strategy."
When my H was cheating, I chose (after knowing about the A for a few weeks) to approach OWH - at his home - with proof at a time when I knew OW was on an overnight "date" with my H. I didn't do it for a result - good or bad. I honestly didn't care what happened with my M at that time and was undecided if I wanted it anymore. Personally, I felt it was my duty - my obligation - as a decent human being to tell the poor man that his W was having unprotected sex with another man. I would have wanted to know.
M: 40 H: 44 Married 14 years S11 & D6; D20 & D19 from previous M 2BDs/PAs, 8 years apart Piecing: April 2014